Difference between DHCP relay & DHCP IP helper address

Unanswered Question
Nov 13th, 2008

Hi Guys,

Can anyone please explain what is the difference between DHCP relay & DHCP IP helper address? Or please give me any useful URL for both of these.

I have this problem too.
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Jon Marshall Thu, 11/13/2008 - 22:01


A DHCP relay agent is any device that forwards DHCP packets between a client and a DHCP server. Cisco routers can act as DHCP relay agents and the way you tell them to do this is to configure the "ip helper-address " under the router interfaces.

So the ip helper-address is simply the way Cisco implements the DHCP relay function on it's routers.



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